Get originResponseStatus from graphql analytics API?

Exploring the graphql analytics API schema with a graphql client, it appears that only edgeResponseStatus is available in zones.httpRequests1mGroups.sum.responseStatusMap.

This is really a request for any Cloudflare staff reading, rather than the community, but it’d be great to have originResponseStatus too. Our main motivating usecase for this at GitLab is to be able to distinguish between HTTP 503s/502s that we serve from the origin, and those served by Cloudflare without proxying to the origin, for with originResponseStatus should equal 0.